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Re: [sensors] Exposing secondary values in the SensorReading

From: Rick Waldron via GitHub <sysbot+gh@w3.org>
Date: Tue, 15 Nov 2016 19:43:40 +0000
To: public-device-apis-log@w3.org
Message-ID: <issue_comment.created-260745490-1479239018-sysbot+gh@w3.org>
A barometric sensor doesn't measure or provide a measurement of 
temperature, only atmospheric pressure. I've checked the datasheets of
 15 magnetometer sensors, including one that I know to be  used in an 
android device, and none produce a bias measurement. Two allow a 
positive or negative bias to be applied via configuration. I'd like to
 understand more about _where_ those bias values are coming from. 

| Model      | Bias ? | Read | Write/Config |
| ---------- | ------ | ---- | ------------ |
| AK8975     | No     |      |              |
| AK8975C    | No     |      |              |
| HMC2003    | No     |      |              |
| HMR2300    | No     |      |              |
| HMC5843    | Yes    | No   | Yes          |
| HMC5883L   | Yes    | No   | Yes          |
| LIS3MDL    | No     |      |              |
| LSM303AGR  | No     |      |              |
| LSM303DLHC | No     |      |              |
| LSM303AH   | No     |      |              |
| LSM303C    | No     |      |              |
| LSM303D    | No     |      |              |
| LSM9DS0    | No     |      |              |
| LSM9DS1    | No     |      |              |
| MAG3110    | No     |      |              |



- AK8975 is found in androids

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Received on Tuesday, 15 November 2016 19:43:46 UTC

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